Crusher roll surfacing technology

Abstract

The invention relates to the field of crusher roll surfacing, in particular to a crusher roll surfacing technology. The technology comprises the following specific steps including (1) defect removing;(2) setting; (3) preheating; (4) surfacing transition; (5) outer surface welding; (6) cooling; and (7) machining. High-alloy martensitic steel serves as surfacing materials and is resistant to a hightemperature, good in abrasion resistance, high in cladding metal hardness, good in high temperature property and capable of bearing a high load; components of a surfacing layer are similar to 4Cr5W8MoV, corresponding soldering flux is used in a matched mode, HRC reaches 59+ / -2, the effective thickness of the surfacing layer is 20 mm or above generally, the roll surface is subjected to rough machining after surfacing is completed, and the size restores to the original size according to drawing requirements; and meanwhile, diagonal stripe grooves are formed in the roll surface, feeding is facilitated, and material supplementing is uniform.

Description

Technical field [0001] The invention relates to the field of crusher roll surfacing welding, in particular to a crusher roll surfacing welding process. Background technique [0002] Rolls are important vulnerable spare parts for steel rolling production. Similarly, due to high temperature wear and tear of crusher rolls in sintering plants, the roll surface is vulnerable to damage and even partially peeled off, which affects the output of crushed sintered materials. And the regular shutdown and maintenance are subject to time constraints. At the same time, it also increases maintenance costs and increases business costs. The crusher roll skin generally adopts ZG35CrMnSi material. The newly-made crushing roller is generally used for up to three months on the machine, and it will produce a lot of wear and tear, and the wear resistance is poor. In order to reduce the cost, it is very important to repair the crushing roller reasonably. Summary of the invention [0003] In order to s...

AI Technical Summary

Problems solved by technology

The new crushing rollers are generally used on the machine for at most three months, which will cause a lot of wear and tear, and the wear resistance is poor. In order to reduce the expenditure cost, it is very important to repair the crushing rollers reasonably